The genusPicris (Asteraceae,Lactuceae) in Tropical Africa |
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| Authors: | H. Walter Lack |
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| Affiliation: | (1) Botanischer Garten und Botanisches Museum Berlin-Dahlem, Königin-Luise-Str. 6-8, D-1000 Berlin 33, Germany |
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| Abstract: | Three species of the genusPicris L. are native in Tropical Africa:P. abyssinicaSch. Bip. (Ethiopia),P. xylopodaLack, spec. nova (Nigeria, Ethiopia) andP. humilis DC. (Senegal, Mali). There are indications that the two perennial species,P. abyssinica andP. xylopoda, are related to and have evolved from a primitive Central Asiatic stock in a manner parallel to many African species ofCrepis L.P. humilis, on the other hand, is a small annual plant with a high number of derived characters. The introduced species of European origin growing south of the Sahara are briefly mentioned. |
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| Keywords: | Asteraceae Lactuceae Hypochoeridinae Picris Taxonomic revision: typification characters distribution ecology and evolution Introduced species Flora of tropical Africa |
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